These economically priced, unglazed bonsai pots in various shapes are made by ceramic artists in the Yixing province of China. These pots are slip cast in moulds before being fired.
With conifers, unglazed pots are generally used. However unglazed pots can be found in different colour hues of clay. It is best to choose one which harmonizes well with the tree. Brown can be considered a universally acceptable colour as it is the colour of the earth.
Always keep in mind that the most important item is the tree and the pot must be subordinate to it. To read more about choosing a pot read this helpful guide.